Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-20S
The AirTAC Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø50mm bore and 300mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ50 mm
- Stroke300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 30 mm
About the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-20S
The AirTAC SAIJ50X300-20-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 300 mm travel to a precise 280-300 mm window. It delivers 982 N of push force at 0.5 MPa, scaling up to 1767 N at 0.9 MPa, making it well-suited for moderate-load positioning tasks. The integrated magnet enables position feedback via CMSE reed or DMSE solid-state sensors.
This variant features a SUS420J2 stainless steel rod and PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting footprint is dimensionally interchangeable with ISO 15552 cylinders.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-20S Technical Specifications
| Model | Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 300 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-20S Is Used
Variable End-Stop Tuning
Dial in the exact retract distance from 280 to 300 mm during machine commissioning to accommodate different material thicknesses without external stop blocks.
Product Changeover
Quickly adjust the effective stroke on a packaging line when switching to a new carton size, minimizing downtime between production runs.
Sensor-Ready Positioning
Leverage the integrated -S magnet with DMSE solid-state sensors to confirm the adjusted end-position in automated assembly fixtures.
Is the Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-20S the Right Cylinder?
Choose this 50 mm bore when a 40 mm bore (628 N at 0.5 MPa) lacks the necessary thrust, but a 63 mm bore (1559 N at 0.5 MPa) is physically oversized. The 20 mm adjustment range is ideal for product changeovers, letting you fine-tune the retract end-position without swapping the cylinder or adding external stops. Because the 300 mm stroke is relatively long, an external guide rail is recommended to prevent excessive side-loading on the 20 mm rod.
For load-holding applications without live air pressure, note that the rear adjuster acts only as a travel stop, not a lock. Consider the AirTAC SAIL or BSAI series for pneumatic locking requirements. This SKU uses PT ports and the SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, TCM2.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ50 Adjustable Cylinder SAIJ50AX300-20S FAQ
At 0.5 MPa it provides 982 N push and 825 N pull force. At 0.9 MPa, the push force reaches 1767 N. The operational speed range is 30-800 mm/s.
The rear adjuster screw acts as a mechanical stop to shorten the stroke by up to 20 mm, creating a 280-300 mm usable travel window. It is a stop, not a lock, and requires live air to hold position.
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